Nice to hear.
I decided to try creating mods and noticed something. The Fire Butterfly card reminded me of spells from MtG, so I decided to create something similar to a Fire Butterfly - spells that immediately fall into the graveyard after entering the battlefield. I set their strength and health to 0, but they stay on the battlefield, can't attack, but can block. I also made a spell that reduces the health of my creature. If this spell reduces the health to 0, it also remains on the battlefield.
And will it be possible to create your own types of cards?